Filters: Tags: Sculpin (X) > Extensions: Citation (X)
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Juvenile sculpin (Cottus extensus) less than 30 mm long exhibit a diel vertical migration in the limnetic zone of Bear Lake (Utah-Idaho). Using mid-water and bottom trawls we found that these fish inhabit the bottom of the lake (5� C) during the day but migrate 30?40 m into the water column at night where they reside in the metalimnion or epilimnion at temperatures near 13?16�C. Larger fish do not migrate into the water column. Stomach analyses demonstrated that the young-of-the-year fish do not migrate into the water column to feed: from July to October their diet is 70?93% benthic ostracods and copepods, and pelagic prey are rarely consumed. Furthermore, gut fullness of the sculpin increases through the daylight...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Oecologia,
Sculpin,
digestion,
growth,
migration,
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